7305 Tubes and pipes, having circular cross-sections and an external diameter of > 406,4 mm, of flat-rolled products of iron or steel `e.g., welded, riveted or similarly closed`

7305 (01/1988-..) Tubes and pipes, having circular cross-sections and an external diameter of > 406,4 mm, of flat-rolled products of iron or steel `e.g., welded, riveted or similarly closed` 73051100 (01/1988-..) Line pipe of a kind used for oil or gas pipelines, having circular cross-sections and an external diameter of > 406,4 mm, of iron or steel, longitudinally submerged arc welded 73051200 (01/1988-..) Line pipe of a kind used for oil or gas pipelines, having circular cross-sections and an external diameter of > 406,4 mm, of iron or steel, longitudinally arc welded (excl. products longitudinally submerged arc welded) 73051900 (01/1988-..) Line pipe of a kind used for oil or gas pipelines, having circular cross-sections and an external diameter of > 406,4 mm, of flat-rolled products of iron or steel (excl. products longitudinally arc welded) 73052000 (01/2004-..) Casing of a kind used in drilling for oil or gas, having circular cross-sections and an external diameter of > 406,4 mm, of flat-rolled products of iron or steel 73052010 (01/1988-12/2003) Casing of a kind used in drilling for oil or gas, having circular cross-sections and an external diameter of > 406,4 mm, of iron or steel, longitudinally welded 73052090 (01/1988-12/2003) Casing of a kind used in drilling for oil or gas, having circular cross-sections and an external diameter of > 406,4 mm, of flat-rolled products of iron or steel (excl. products longitudinally welded) 73053100 (01/1988-..) Tubes and pipes having circular cross-sections and an external diameter of > 406,4 mm, of iron or steel, longitudinally welded (excl. products of a kind used for oil or gas pipelines or of a kind used in drilling for oil or gas) 73053900 (01/1988-..) Tubes and pipes having circular cross-sections and an external diameter of > 406,4 mm, of iron or steel, welded (excl. products longitudinally welded or of a kind used for oil or gas pipelines or of a kind used in drilling for oil or gas) 73059000 (01/1988-..) Tubes and pipes having circular cross-sections and an external diameter of > 406,4 mm, of flat-rolled products of iron or steel, welded (excl. welded products or products of a kind used for oil or gas pipelines or of a kind used in drilling for oil or gas)